CN218545334U

CN218545334U - NCG (negative control group) condensate recovery system of low-temperature multi-effect seawater desalination device

Info

Publication number: CN218545334U
Application number: CN202221174686.2U
Authority: CN
Inventors: 李承磊; 依庆文; 苏大鹏; 高志锐; 王峰
Original assignee: Tianjin Sdic Jinneng Electric Power Co ltd
Current assignee: Tianjin Sdic Jinneng Electric Power Co ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2023-02-28
Anticipated expiration: 2032-05-06

Abstract

The utility model relates to a low temperature sea water desalination technical field provides a low temperature multiple effect sea water desalination device's NCG condensate recovery system, include: NCG heat exchanger, NCG circulating water moisturizing pipe, NCG heat exchanger output and NCG circulating water outlet pipe are connected, and NCG circulating water moisturizing pipe sets up on NCG circulating water outlet pipe branch road, is provided with moisturizing hand-operated valve on the NCG circulating water moisturizing pipe, still includes: the device is simple in structure, convenient to operate, reliable in operation and low in cost, and realizes the recovery of redundant fresh water in the NCG heat exchanger in the original NCG circulating water system of the low-temperature multi-effect seawater desalination device.

Description

NCG (negative control group) condensate recovery system of low-temperature multi-effect seawater desalination device

Technical Field

The utility model relates to a low temperature sea water desalination technical field has especially related to a low temperature multiple effect sea water desalination device's NCG condensate recovery system.

Background

The low-temperature multi-effect seawater desalination device adopts a multi-stage flash evaporation mode under a negative pressure state to realize seawater desalination, is provided with a special non-condensing gas pumping system, and condenses the seawater by using NCG circulating cooling water.

The existing low-temperature multi-effect seawater desalination device adopts a multi-stage flash evaporation mode under a negative pressure state to realize seawater desalination, is provided with an independent non-condensing gas (NCG) pumping system, and condenses the seawater by using NCG circulating cooling water. In the operation process of the traditional NCG circulating cooling water condensation system, because NCG gas still contains part of steam, the cooling water quantity in the NCG heat exchanger is gradually increased in the circulating condensation process of the NCG circulating cooling water, and the part of cooling water belongs to one part of desalted water, and has higher water quality and is still directly discharged.

The original scheme has the following problems: in the circulating and condensing process of the NCG circulating cooling water of the original low-temperature multi-effect seawater desalination device, the cooling water amount in the NCG heat exchanger is gradually increased, the part of the cooling water belongs to one part of the desalinated water, the water quality is higher, and the water is still directly discharged, so that huge waste is caused.

SUMMERY OF THE UTILITY MODEL

In order to solve original low temperature multiple effect sea water desalination device NCG recirculated cooling water circulation condensation process, the cooling water yield in the NCG heat exchanger risees gradually, and this part cooling water belongs to the partly of desalination, and quality of water is higher still directly discharges, causes huge extravagant problem, the utility model provides a low temperature multiple effect sea water desalination device's NCG condensate recovery system solves this problem.

In order to achieve the above purpose, the utility model provides a following technical scheme:

an NCG condensed water recovery system of a low-temperature multi-effect seawater desalination device comprises: the water supply device comprises an NCG heat exchanger and an NCG circulating water replenishing pipe, wherein the output end of the NCG heat exchanger is connected with an NCG circulating water outlet pipe, the NCG circulating water replenishing pipe is arranged on a branch pipeline of the NCG circulating water outlet pipe, and a water replenishing manual valve is arranged on the NCG circulating water replenishing pipe.

Preferably, the method further comprises the following steps: the output end of the condensed water heat exchanger is connected with a condensed water outlet pipe, and the condensed water outlet pipe is connected with the NCG circulating water outlet pipe through a recovery pipeline.

Preferably, the recovery pipeline is made of stainless steel.

Preferably, a recovery manual valve is further arranged on the recovery pipeline.

Preferably, the recovery pipeline is further provided with a recovery check valve, and the recovery check valve is arranged on the upstream of the recovery manual valve.

The utility model has the advantages that: this device is through increasing the NCG circulating water moisturizing pipe, not only can carry out the moisturizing when the NCG system starts, can also retrieve by the NCG circulating water moisturizing pipe when the water yield is too much, through increasing the recovery pipeline, realized in the water yield of NCG heat exchanger among the NCG circulating water system when too high in the condensate water heat exchanger of nearby recovery in the condensate water system.

Drawings

The accompanying drawings, which form a part of the present disclosure, are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and together with the description serve to explain the present disclosure. In the drawings:

fig. 1 is a schematic plan view of the present invention.

Description of reference numerals:

1. an NCG heat exchanger; 2. an NCG circulating water replenishing pipe; 11. an NCG circulating water outlet pipe; 21. a water-replenishing manual valve; 3. a condensed water heat exchanger; 4. a recovery pipeline; 31. a condensed water outlet pipe; 41. recovering the manual valve; 42. and recovering the check valve.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The examples, described with reference to FIG. 1:

an NCG condensed water recovery system of a low-temperature multi-effect seawater desalination device comprises: NCG heat exchanger 1, NCG circulating water moisturizing

pipe

2, 1 output and the NCG circulating water outlet pipe 11 of NCG heat exchanger are connected, NCG circulating water moisturizing pipe 2 sets up on 11 branches of NCG circulating water outlet pipe, is provided with moisturizing hand-operated valve 21 on the NCG circulating water moisturizing pipe 2, and NCG heat exchanger 1 is prior art, no longer gives details again, and NCG circulating water moisturizing pipe 2 not only can carry out the moisturizing when the NCG system starts, can also retrieve through NCG circulating water moisturizing pipe 2 when the water yield is too much.

This device still includes: condensate water heat exchanger 3 and

recovery pipeline

4, 3 output ends of condensate water heat exchanger are connected with condensate water outlet pipe 31, connect through recovery pipeline 4 between condensate water outlet pipe 31 and the NCG circulating water outlet pipe 11, and condensate water heat exchanger 3 is prior art, no longer gives details again, because in original system, condensate water outlet pipe 31 of condensate water heat exchanger 3 is apart from the characteristics that NCG circulating water outlet pipe 11 distance is nearer, designs recovery pipeline 4, and is with low costs, efficient.

The recovery pipeline 4 is made of stainless steel materials, and the water is recovered to the condensate water heat exchanger 3 in the condensate water system nearby when the water amount in the NCG heat exchanger 1 in the NCG circulating water system is too high.

The recovery pipeline 4 is also provided with a recovery manual valve 41, when the recovery manual valve 41 is closed, the isolation of the NCG heat exchanger 1 and the condensed water heat exchanger 3 is realized, and when the recovery manual valve 41 is opened, the recovery of the NCG heat exchanger 1 is realized.

The recovery pipeline 4 is further provided with a recovery check valve 42, the recovery check valve 42 is arranged at the upstream of the recovery manual valve 41, and the recovery check valve 42 is used for ensuring that the liquid in the recovery pipeline 4 flows from the NCG heat exchanger 1 to the condensed water heat exchanger 3, so that the condensed water in the condensed water heat exchanger 3 is prevented from overflowing to the NCG heat exchanger 1.

The utility model discloses a theory of operation: when the water amount of the NCG heat exchanger 1 in the NCG circulating system is too small, the NCG circulating water supplementing pipe 2 is started to supplement water, when the water amount of the NCG heat exchanger 1 in the NCG circulating system is too large, the NCG circulating water supplementing pipe 2 is started to recover water, and when the water amount of the NCG heat exchanger 1 in the NCG circulating system is too large, the water can be drained to the condensate water heat exchanger 3 in the condensate water system close to the NCG circulating system through the recovery pipeline 4 to recover redundant fresh water in the NCG circulating system.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The above, only do the preferred embodiment of the present invention, not used to limit the present invention, all the technical matters of the present invention should be included in the protection scope of the present invention for any slight modification, equivalent replacement and improvement of the above embodiments.

Claims

1. An NCG condensed water recovery system of a low-temperature multi-effect seawater desalination device comprises: the NCG heat exchanger (1) is characterized by further comprising: NCG circulating water moisturizing pipe (2), NCG heat exchanger (1) output is connected with NCG circulating water outlet pipe (11), and NCG circulating water moisturizing pipe (2) set up on NCG circulating water outlet pipe (11) branch road, is provided with moisturizing manual valve (21) on NCG circulating water moisturizing pipe (2).

2. The NCG condensed water recovery system of the low-temperature multi-effect seawater desalination plant as claimed in claim 1, further comprising: the water-cooled steam generator comprises a condensate water heat exchanger (3) and a recovery pipeline (4), wherein the output end of the condensate water heat exchanger (3) is connected with a condensate water outlet pipe (31), and the condensate water outlet pipe (31) is connected with an NCG circulating water outlet pipe (11) through the recovery pipeline (4).

3. The NCG condensed water recovery system of the low-temperature multi-effect seawater desalination plant as claimed in claim 2, wherein the recovery pipeline (4) is made of stainless steel.

4. The NCG condensed water recovery system of the low-temperature multi-effect seawater desalination plant as claimed in claim 2, characterized in that the recovery pipeline (4) is further provided with a recovery manual valve (41).

5. The NCG condensed water recovery system of the low-temperature multi-effect seawater desalination device as defined in claim 4, wherein the recovery pipeline (4) is further provided with a recovery check valve (42), and the recovery check valve (42) is arranged at the upstream of the recovery manual valve (41).